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11590923 — SCREW,SHOULDER

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

11590923: SCREW,SHOULDER.

The SCREW,SHOULDER is a the manufacturer industrial component. Key specifications include material: STEEL COMP 4130 OR STEEL COMP 4135 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OVERALL, head_style: PAN NO. 2, head_height: 0.080 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN, thread_class: 2A A, head_diameter: 0.380 INCHES NOMINAL IN, thread_length: 0.330 INCHES MINIMUM IN.

This part is cataloged in the U.S. Government catalog under NSN 5305-00-903-0728, indicating validated use in U.S. government and defense logistics supply chains.

Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
11590923
NSN: 5305-00-903-0728
FSC: 5305 — Screws
CAGE: 19207 — U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM (USA)
SPECIFICATIONS
materialSTEEL COMP 4130 OR STEEL COMP 4135 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OVERALL
head_stylePAN NO. 2
head_height0.080 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
thread_class2A A
head_diameter0.380 INCHES NOMINAL IN
thread_length0.330 INCHES MINIMUM IN
shoulder_shapeROUND FIRST SHOULDER
fastener_length0.590 INCHES MINIMUM AND 0.650 INCHES MAXIMUM IN
hardness_rating32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
shoulder_length0.137 INCHES MINIMUM AND 0.142 INCHES MAXIMUM FIRST SHOULDER IN
special_featuresW/UNDERCUT 0.210 IN. MIN 0.230 IN. MAX DIA,0.050 IN. WIDE BETWEEN HEAD AND SHOULDER IN
thread_directionRIGHT-HAND
NSN5305-00-903-0728
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 11590923 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
HEAD HEIGHT: 0.080 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
•
FASTENER LENGTH: 0.590 INCHES MINIMUM AND 0.650 INCHES MAXIMUM IN
•
SHOULDER LENGTH: 0.137 INCHES MINIMUM AND 0.142 INCHES MAXIMUM FIRST SHOULDER IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-C-26074,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
SHOULDER DIAMETER: 0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM FIRST SHOULDER IN
•
THREAD LENGTH: 0.330 INCHES MINIMUM IN
•
SHOULDER SHAPE: ROUND FIRST SHOULDER
•
HARDNESS RATING: 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.080 INCHES MINIMUM AND 0.085 INCHES MAXIMUM IN
FASTENER LENGTH0.590 INCHES MINIMUM AND 0.650 INCHES MAXIMUM IN
SHOULDER LENGTH0.137 INCHES MINIMUM AND 0.142 INCHES MAXIMUM FIRST SHOULDER IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-26074,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SHOULDER DIAMETER0.247 INCHES MINIMUM AND 0.249 INCHES MAXIMUM FIRST SHOULDER IN
THREAD LENGTH0.330 INCHES MINIMUM IN
SHOULDER SHAPEROUND FIRST SHOULDER
HARDNESS RATING32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEPAN NO. 2
OTHER ITEMS IN FSC 5305 — Screws
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5305-00-000-0094 5305-00-000-1397 5305-00-000-2625 5305-00-000-3669 5305-00-000-3830 5305-00-000-3831
SUBSTITUTES & CROSS-REFERENCES 1
5350009030728Reference document
Same NSN cross-reference
Reference document — Informative reference only
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 11590923?
11590923 is a SCREW,SHOULDER.
What parts can replace 11590923?
There is 1 known substitute for 11590923: 5350009030728. Substitute compatibility should be verified for your specific system.
What is the NSN for 11590923?
11590923 is cataloged in the U.S. Government catalog under NSN 5305-00-903-0728. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.