螺丝分类命名及编码(可编辑修改word版)

品名代号对照表
常用螺丝头型、槽型、牙型图
岗ft头（B 头）平头（K 头） C 头
含华司台阶圆头含华丝（PWM）六角含华司（HWM）
外六角头梅花一字槽圆头（P 头）
梅花一字槽美国P 头O 头
盘圆含华司伞头含华司（TWM）T 头
伞头含华司尖尾（TWA）圆头含华司一字梅花槽圆头三角牙（STP）
十字槽加减槽一字槽内三角槽内六角槽梅花一字槽
A 牙
B 牙M 牙STB 牙ST 牙 B 牙 B 双牙T 牙
M A C H I N E S C R E W S
D e s c r i p t i o n M A T
E R I A L S I Z E S
Pan Head Combination Machine Screw
Round Head Combination Machine Screw
Truss Head Combination Machine Screw
Flat Head
Phillips Machine Screw
Undercut
Flat Head
Phillips Machine Screw
Flat Head 100°Phillips Machine Screw
Fillister Head Phillips Machine Screw
Oval Head
Phillips Machine Screw
Pan Head
Phillips Machine Screw
Round Head
Phillips Machine Screw
Truss Head
Phillips Machine Screw
Indented Hex Washer Head
Phillips Machine Screw
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
4-40x1/8 thru 1/4-
20x4
6-32x2 thru 1/4-
20x4
6-32 thru 1/4-20
2-56x1/8 thru 1/2-
13
2-56x1/8 thru 3/8-
16
2-56x1/8 thru 1/4-
20x1-1/2
2-56x1/8 thru 5/16-
18x2
4-40x1/4 thru 1/4-
20x3
2-56x1/8 thru 3/8-
16x3
2-56x1/4 thru 3/8-
16
4-40x3/16 thru 3/8-
16x2-1/4
4-40x1/4 thru 1/4-
20x1
Binding Undercut Slotted Head Machine Screw
Flat Head
Slotted Machine Screw
Undercut
Flat Head
Slotted Machine Screw
Fillister Head
Slotted Machine Screw
Oval Head
Slotted Machine Screw
Pan Head
Slotted Machine Screw
Round Head
Slotted Machine Screw
Truss Head
Slotted Machine Screw
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
2-56x1/8 thru 1/4-
20x1-1/4
2-56x1/8 thru 1/2-
13x6
2-56x1/8 thru 3/8-
16x1/2
2-56x1/8 thru 3/8-
16x1-1/4
4-40x1/4 thru 1/4-
20x2
2-56x1/8 thru 3/8-
16x3
2-56x1/8 thru 1/2-
13x6
4-40x1/4 thru 1/2-
13
Indented
Hex Head
Slotted Machine Screw
Zinc
Plated
Steel
4-40x1/4 thru
16
3/8-
Indented
Hex Head
Unslotted Machine Screw
Zinc
Plated
Steel
4-40x1/4 thru
16
3/8-
Indented Green
Hex Washer Zinc 10-32x3/8 and 10- Slotted Plated 32x1/2 Grounding Screw Steel
Indented
Hex Washer
Slotted Grounding Screw
Zinc
Plated
Steel
4-40x1/4 thru 3/8-
16x2-1/2
Indented
Hex Washer
Slotted Machine Screw
Indented
Hex Washer
Unslotted Machine Screw
Flat Head
Torx® Drive Machine Screw
Pan Head
Torx® Drive Machine Screw
Pan Head
Phillips
Shakeproof®
Square Cone®
Washer
Sems Machine
Screw
Pan Head
Phillips
Split Lock Washer Sems Machine
Screw
Pan Head
Phillips External Sems Machine Screw
Pan Head
Phillips Internal Sems Machine Screw
Pan Head
Slotted External Sems Machine Screw
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Zinc
Plated
Steel
Screw is
Zinc
Plated
Steel
Baked
After
Plating
Screw is
Zinc
Plated
Steel
Baked
After
Plating
Screw is
Zinc
Plated
Steel
Baked
After
Plating
Screw is
Zinc
Plated
Steel
Baked
After
Plating
Screw is
Zinc
Plated
Steel
Baked
After
Plating
4-40x1/4 thru 3/8-
16x2-1/2
4-40x1/4 thru 3/8-
16x2
4-40x1/4 thru 1/4-
20x2
2-56x3/16 thru 1/4-
20x2
4-40x1/4 thru 10-
32x3/4
4-40x1/4 thru 1/4-
20
4-40x3/16 thru 1/4-
20x1-1/4
23-56x1/8 thru 1/4-
20x1
4-40x3/16 thru 1/4-
20x1-1/4
Pan Head
Slotted
Internal Sems
Machine Screw
Flat Head
Phillips
Machine Screw
Pan Head
Phillips
Machine Screw
Types of Screw Heads
Screw is
Zinc
Plated
Steel
Baked
After
Plating
Black
Oxide
Plated
Steel
Black
Oxide
Plated
Steel
4-40x1/4 thru 10-
32x1
2-56x1/8 thru 1/4-
20x2
2-56x1/8 thru 1/4-
20x2
PAN HEAD: Recommended for new
designs to replace round, truss and binding
heads. Provides a low large diameter head, but
with characteristically high outer edge along the-
outer periphery of the head where driving action
is most effective for high tightening 'torques.
Slightly different head contour where supplied
with recessed head.
FLAT HEAD: Supplied to standard
dimensions with an 80' to 82' angle to be used
where finished surfaces require a flush fastening
unit. The countersunk portion offers good
centering possibilities.
ROUND HEAD: Not recommended for new
design (see pan head). This head was the most
universally used design in the past.
OVAL HEAD: Fully specified as "oval
countersunk", this head is identical to the
standard flat head. but possesses. in addition, a
rounded, neat appearing upper surface for
attractiveness of design.
FILLISTER HEAD: The-standard oval
fillister head has a smaller diameter than the
round head. but is higher with a correspondingly
deeper slot. The smaller diameter head
increases the pressure applied on the smaller
area and can be assembled close to flanges and
raised surfaces. Headed in counter bored dies to
Insure concentricity, they may be used
successfully in counter bored holes.
BINDING HEAD (Straight Side): Most
generally used in electrical and radio work
because of its identifying undercut beneath the
head, which binds and eliminates fraying of
stranded wire. Offers an attractively designed,
medium-low head with ordinarily sufficient
bearing surface. 'Not ordinarily recommended as
a Phillips Recessed head-see Pan Head for
better functional design.
TRUSS HEAD: Also known as oven head, stove head, and oval binding head. A low, neat appearing, large diameter head having excellent design qualities, and as illustrated can be used to cover larger diameter clearance holes in s heet metal when additional play In assembly tolerance is required. Suggest pan head as a substitute.
HOLT HEAD (PATENTED): Provides the perfect tamper-proof assembly. Theft-proof - decorative, yet inexpensive. Special drivers available for field removal or power driven assembly machines.
ONE-WAY HEAD: This ingenious, tamper-proof type of head, once assembled cannot be removed. yet is driven with a standard screw driver. Manufactured with amazing economy in productive quantities, this, simple design can frequently solve costly assembly problem.
PHILIPS FINISHING WASHER HEAD: Designed as a neat appearance product for the electronic and appliance trade with all threaded styles.
WASHER HEAD: This design has the finished appearance of a conventional round head plus washer and was originality created to provide extra large bearing surface under the head. The modern "truss" head (carried in stock) normally answers this purpose. When a. larger diameter is required this washer head is recommended.
FLAT AND OVAL HEADS (UNDERCUTI: This Is the standard flat or oval head SO' to 82' countersunk screw which has the lower one-third of the countersunk portion removed to facilitate production of extremely short lengths. As Illustrated, it will fit a standard counterbored hole and Is particularly adaptable to flush assemblies in thin stock.
FLAT HEAD (100' COUNTERSUNK): This special flat head screw has been developed for applications requiring flush surfaces, and is recommended for use In soft materials. to distribute pressure over a larger and less angular surface. Very well adapted for use with thin aluminum, soft plastics, etc.
SQUARE SHOULDER SCREWS:
An adaptation of the standard carriage bolt design.
Possesses a truss head on a square shank which resists rotation when located or, driven into place. This square shoulder may also be staked Into place as a permanent fastener. A great many varieties in all screw diameters are available in productive quantities.
Flat Head styles take full advantage of the self-centering feature of the countersunk portion and provide a smooth, flush outer surface. Type "T" (Overlug) For applications requiring smooth, finished outer surfaces. Under surface of head is designed for perfect electrode contact.
INDENTED HEXAGON: An i nexpensive
wrench head fastener made to standard
hexagon head dimensions. The hex Is
completely cold upset in a counterbored die and
possesses an Identifying depression In the top
surface of the head.
INDENTED HEXAGON WASHER
HEAD: Produced in the same manner as the
standard Indented hexagon head but with a
washer section at the base of the head to protect
the finish of the assembly from wrench
disfigurement.
ACORN HEAD (FULL UNDERCUTI: A very
neat appearing trim screw for appliance
application-excellent wrench surfaces.
HEXAGON HEAD (TRIMMED): This is the
standard type of wrench-applied hexagon head,
characterized by clean, sharp corners trimmed to
close tolerances. Recommended for general
applications. It Is available In all standard
patterns and In all thread diameters.
HEAD STYLES (WELDING SCREWS):
The welding screw has been developed to
provide a strong permanent threaded fastener
which becomes an Integral part of the assembly.
It utilizes the principle of projection welding by
means of multiple lugs applied to various head
surfaces.
Type "U" (Underlug) for general application.
Assembles easily into pre-located holes and fully
utilizes head strength. Top surfaces of head
designed for efficient welding anode contact. ST A I N L E SS ST EE L W A S H E R S
D E S C R I P T I ON M A T E R I A L S I Z E S
Standard Flat Washers
18-8
Stainless
Steel
1/4 thru
1.0
Standard Flat Washers
316
Stainless
Steel
1/4 thru
1.0
Fender Washers
18-8
Stainless
Steel
#10x11/16
thru
1/2x2
Machine Screw Washers
Medium Split Lock Washers
18-8
Stainless
Steel
18-8
Stainless
Steel
#2 thru
#10
#2 thru
1.00
External Tooth Lock Washers Internal Tooth Lock Washers
410 Stainless Steel
410 Stainless Steel
#4 thru 3/8
#2 thru 3/8
M E T R I C N U TS
D I N S P
E C C L A SS
M A T E R I A L S I Z E S
934
Class 6 Style 1
Zinc Plated Steel Nut
*M2 & M3
934
Class 8 Zinc Plated Steel Nut
Style 1
*M4
thru
934
Class
Plain Steel Nut
10
thru M20
985
Class 8
Zinc Plated Steel Nylon Insert Lock Nut
M3 thru M20
* M4 and smaller nuts do not require class marking
Class 934 10
Zinc Plated Steel
Nut
M20
M6 thru Style 1
M20
M6。