National Stock number : 5305-01-128-5121
Close Tolerance Screw
| Available Quantity | 740 |
| Available Conditions | NS NE |
| Classification | Screws - FSC 5305 |
| Schedule B | 7318152000 |
| Stock Check Date | 02/04/2026 |
Part-Number.info Quality System
- ISO 9001:2015 + AS9120B Certifed
- Audited supply chain
- Counterfeit Parts Prevention
- 100% Product Inspections
- 7 Year Record Retention
- HAZMAT Certified
- ITAR and DDTC Registered
Product Properties
Description
Close Tolerance Screw
Thread Class
3a
Thread Direction
RIGHT-Hand
Thread Length
0.316in. and 0.366in. ⁓3/8"
Fastener Length
4.326in. and 4.356in. ⁓4-23/64"
Head Style
pan no. 2
Head Diameter
0.477in. and 0.492in.
Head Height
0.140in. and 0.150in. ⁓5/32"
Grip Diameter
0.2485in. and 0.2495in.
Internal Drive Style
offset cruciform (torque set)
Nominal Thread Diameter
0.250in. ⁓1/4"
Grip Length
3.990in. and 4.010in.
Thread Quantity Per Inch
28
Minimum Tensile Strength
160000 pounds per square inch
Hardness Rating
36.0 rockwell c and 40.0 rockwell c
Surface Finish
32.0 microinches threads
Material
steel comp E4340 or steel comp 4140 or steel comp 8740 or steel comp 8735 or steel comp 6150
Surface Treatment
cadmium and chromate
Surface Treatment Document And Classification
QQ-P-416, ty 2, cl 2 fed spec single treatment response
Thread Series Designator
unjf
Specification/standard Data
80205-NAS1578 professional/industrial association standard
