National Stock number : 5306-01-507-7350
Machine Bolt
| Available Quantity | 3,659 |
| Available Conditions | NE NS |
| Classification | Bolts - FSC 5306 |
| 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
Machine Bolt
Thread Class
3a
Thread Direction
RIGHT-Hand
Thread Length
0.740in. and 0.820in. ⁓53/64"
Fastener Length
1.552in. and 1.572in. ⁓1-37/64"
Head Style
hexagon
Head Height
0.240in. and 0.260in. ⁓17/64"
Width Between Flats
0.430in. and 0.439in.
Hole Diameter
0.060in. and 0.080in. ⁓3/32"
Nominal Thread Diameter
0.250in. ⁓1/4"
Grip Length
0.752in. and 0.812in.
Hole Quantity
6
Hole Type
drilled
Features Provided
finished head
Thread Quantity Per Inch
28
Minimum Tensile Strength
130000 pounds per square inch
Hardness Rating
24.0 rockwell c and 35.0 rockwell c
Minimum Yield Strength
85000 pounds per square inch
Hole Configuration Style
hexagon longitudinal hole
Surface Finish
32.0 microinches threads
Part Name Assigned By Controlling Agency
bolt, MACHINE-Hexagon head, full shank, AMS5731, .250-28 UNJF-3A
Material
iron alloy 660
Material Document And Classification
ams 5731 assn std single material response
Thread Series Designator
unjf
