Description
Captive screws are designed to lock into a hole while allowing the fastened components to be detached without the complete removal of the screw. Thus a captive screw can be locked in place on a parent component without being fastened to a child component. Captive fasteners are typically locked in place using thread locking, press-fitting, or broaching.
Type 1: For captive panel retainers used with these screws see pages 80 and 81.
Material • SS-Corrosive Resisting Steel (Stainless Steel): ASTM A581-75 thru 1/2 O.D. over 1/2 AMS-5762.
- B-Brass: QQ-B-626 Comp 22 1/2 Hard.
- NOTE: Available in other materials on special order – Price on Application.
Standard • For Corrosive Resisting Steel (SS):
Finish • Amatom Finish No. 7 – Passivate per cres QQ-P-35.
- For Brass (B):
Amatom Finish No. 4 – Nickel plate – QQ-N-290 Grade G.
Head • Brushed and Polished Heads – Available on special order only.
Threads • UNC-2A and UNF-2A per National Bureau of Standards Handbook H28 titled “Screw-Thread Standards for Federal Services.”
Workmanship • To high precision standards.
Quality Control • To MIL-STD-105. Made for use on government equipment.
Notes: • Any similar type captive screw in any
increment of body or thread length is available on special order. Price on application.
- Parts normally stocked slotted. Unslotted available on order. Price on application.
- The stainless steel captive screws are made to MIL-E-16400 (ships).
- Available “Burr Free” for ultra precision parts. Price on application.
|
THREAD |
MATERIAL |
A
±.005 |
B
±1/64 |
C
±.005 |
D +.010 -.005 |
E
±.015 |
F
REF. |
G
±.005 |
J +.000 -.016 |
KNURL |
M CHAMFER 45º MAX. |
|
|
BRASS |
STAIN- LESS STEEL |
TEETH PER INCH |
||||||||||
|
4-40 UNC-2A |
B |
SS |
5/16 |
5/16 |
.047 |
.078 |
.125 |
5/64 |
.078 |
.078 |
40 |
.022 |
|
6-32 UNC-2A |
B |
SS |
5/16 |
5/16 |
.047 |
.078 |
.212 |
3/32 |
.095 |
.095 |
40 |
.022 |
|
8-32 UNC-2A |
B |
SS |
5/16 |
5/16 |
.047 |
.078 |
.212 |
3/32 |
.120 |
.120 |
40 |
.022 |
|
10-24 UNC-2A |
B |
SS |
3/8 |
7/16 |
.063 |
.094 |
.250 |
5/32 |
.130 |
.130 |
40 |
.030 |
|
10-32 UNF-2A |
B |
SS |
3/8 |
7/16 |
.063 |
.094 |
.250 |
5/32 |
.130 |
.130 |
40 |
.030 |
|
1/4-20 UNC-2A |
B |
SS |
1/2 |
9/16 |
.078 |
.094 |
.313 |
3/16 |
.175 |
.175 |
30 |
.038 |
|
1/4-28 UNF-2A |
B |
SS |
1/2 |
9/16 |
.078 |
.094 |
.313 |
3/16 |
.175 |
.175 |
30 |
.038 |
|
5/16-18 UNC-2A |
B |
SS |
5/8 |
11/16 |
.094 |
.125 |
.375 |
1/4 |
.230 |
.230 |
30 |
.041 |
|
5/16-24 UNF-2A |
– |
SS |
5/8 |
11/16 |
.094 |
.125 |
.375 |
1/4 |
.230 |
.230 |
30 |
.041 |
(PANEL SCREW – EXTERNALLY RELIEVED BODY ) Per FSC-5305-120
TABLE 2 – Type 1
For all dimensions other than length refer to Table 1 (page 68)
|
Length |
Part No. |
Threads |
||||||||
|
4-40 |
6-32 |
8-32 |
10-24 |
10-32 |
1/4-20 |
1/4-28 |
5/16-18 |
5/16-24 |
||
|
3/8 7/16 1/2 |
6100 6101 6102 |
4-40 4-40 4-40 |
6-32 6-32 6-32 |
8-32 |
|
|
|
|
|
|
|
9/16 5/8 11/16 3/4 |
6103 6104 6105 6106 |
4-40 4-40 4-40 4-40 |
6-32 6-32 6-32 6-32 |
8-32 8-32 8-32 8-32 |
10-24 10-24 10-24 |
10-32 10-32 10-32 |
1/4-20 1/4-20 1/4-20 |
1/4-28 |
|
|
|
13/16 7/8 15/16 1 |
6107 6108 6109 6110 |
4-40 4-40 4-40 4-40 |
6-32 6-32 6-32 6-32 |
8-32 8-32 8-32 8-32 |
10-24 10-24 10-24 10-24 |
10-32 10-32 10-32 10-32 |
1/4-20 1/4-20 1/4-20 1/4-20 |
1/4-28 1/4-28 1/4-28 1/4-28 |
5/16-18 |
5/16-24 |
|
1-1/16 1-1/8 1-3/16 1-1/4 |
6111 6112 6113 6114 |
4-40 4-40 4-40 4-40 |
6-32 6-32 6-32 6-32 |
8-32 8-32 8-32 8-32 |
10-24 10-24 10-24 10-24 |
10-32 10-32 10-32 10-32 |
1/4-20 1/4-20 1/4-20 1/4-20 |
1/4-28 1/4-28 1/4-28 1/4-28 |
5/16-18 5/16-18 5/16-18 5/16-18 |
5/16-24 5/16-24 5/16-24 5/16-24 |
|
1-5/16 1-3/8 1-1/2 1-3/4 2 |
6115 6116 6117 6118 6119 |
4-40 4-40 4-40 4-40 4-40 |
6-32 6-32 6-32 6-32 6-32 |
8-32 8-32 8-32 8-32 8-32 |
10-24 10-24 10-24 10-24 10-24 |
10-32 10-32 10-32 10-32 10-32 |
1/4-20 1/4-20 1/4-20 1/4-20 1/4-20 |
1/4-28 1/4-28 1/4-28 1/4-28 1/4-28 |
5/16-18 5/16-18 5/16-18 5/16-18 5/16-18 |
5/16-24 5/16-24 5/16-24 5/16-24 5/16-24 |
Other lengths and threads available on special order, contact sales office.
PART NO. indicates the style and length of the screw. The number for each different length in any one style is the same for all head sizes.
Captive fasteners are available in a variety of configurations and designs.
| Style | Locking Style | Drive Style | Materials |
| Flush Captive Screws | Flare-In | Philips | Steel |
| Spring-Loaded Captive Screws | Broaching / Spline | Slotted | Stainless Steel |
| Low Profile Captive Screws | Thread Locking | Socket | Brass |
| Knob Captive Screws | Soldering | Torx | Aluminum |
Manufacturer: Amatom
MFG Part #: Amatom-Captive-Screw
