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HM137 — SCREW,EXTERNALLY RELIEVED BODY

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

HM137: SCREW,EXTERNALLY RELIEVED BODY.

The SCREW,EXTERNALLY RELIEVED BODY is a the manufacturer industrial component. Key specifications include material: ASBESTOS AND GRAPHITE AND RUBBER SYNTHETIC OVERALL, head_style: FLAT CHAMFER, head_height: 0.141 INCHES NOMINAL IN, thread_class: 2A A, head_diameter: 0.292 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN, thread_length: 0.210 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5305-00-208-7381, 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
HM137
NSN: 5305-00-208-7381
NIINs: 002087381, 002980372
FSC: 5305 — Screws
CAGE: 57057 — NAVCOM DEFENSE ELECTRONICS, INC. (USA)
SPECIFICATIONS
materialASBESTOS AND GRAPHITE AND RUBBER SYNTHETIC OVERALL
head_styleFLAT CHAMFER
head_height0.141 INCHES NOMINAL IN
thread_class2A A
head_diameter0.292 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN
thread_length0.210 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
fastener_length0.590 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
thread_directionRIGHT-HAND
rim_surface_width0.750 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
peripheral_diameter1.125 INCHES NOMINAL IN
center_hole_diameter0.750 INCHES NOMINAL IN
NSN5305-00-208-7381
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: HM137 · 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: 0.141 INCHES NOMINAL IN
•
FASTENER LENGTH: 0.590 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
•
THREAD LENGTH: 0.210 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
•
FIRST DIAMETER FROM HEAD: 0.190 INCHES NOMINAL IN
•
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER: 0.380 INCHES NOMINAL IN
•
NOMINAL THREAD DIAMETER: 0.190 INCHES IN
•
HEAD STYLE: FLAT CHAMFER
•
THREAD DIRECTION: RIGHT-HAND
TECHNICAL CHARACTERISTICS
HEAD HEIGHT0.141 INCHES NOMINAL IN
FASTENER LENGTH0.590 INCHES MINIMUM AND 0.610 INCHES MAXIMUM IN
THREAD LENGTH0.210 INCHES MINIMUM AND 0.230 INCHES MAXIMUM IN
FIRST DIAMETER FROM HEAD0.190 INCHES NOMINAL IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER0.380 INCHES NOMINAL IN
NOMINAL THREAD DIAMETER0.190 INCHES IN
HEAD STYLEFLAT CHAMFER
THREAD DIRECTIONRIGHT-HAND
SECOND DIAMETER FROM HEAD0.130 INCHES MINIMUM AND 0.133 INCHES MAXIMUM IN
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER0.040 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HM137?
HM137 is a SCREW,EXTERNALLY RELIEVED BODY.
What is the NSN for HM137?
HM137 is cataloged in the U.S. Government catalog under NSN 5305-00-208-7381. 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.