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Technical Data Sheet
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72508 — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

RESISTOR,VARIABLE,WIRE WOUND,PRE. Key specifications include material: PLASTIC BOARD, body_style: BARRIER TYPE, body_width: 1.625 INCHES NOMINAL IN, head_style: HEXAGON, body_height: 2.375 INCHES NOMINAL IN, body_length: 1.625 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System under NSN 5305-00-286-3804, 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
72508
NSN: 5305-00-286-3804
FSC: 5305
CAGE: 57712 — TELEMECHANICS INC (USA)
SPECIFICATIONS
materialPLASTIC BOARD
body_styleBARRIER TYPE
body_width1.625 INCHES NOMINAL IN
head_styleHEXAGON
body_height2.375 INCHES NOMINAL IN
body_length1.625 INCHES NOMINAL IN
head_height0.094 INCHES NOMINAL IN
thread_class3A A
thread_length0.406 INCHES MINIMUM IN
inclosure_typeFULLY INCLOSED
screw_materialSTEEL
fastener_length0.750 INCHES NOMINAL IN
NSN5305-00-286-3804
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 72508 · 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
•
INTERNAL DRIVE STYLE: CROSS RECESS TYPE 1
•
THREAD SERIES DESIGNATOR: UNF
•
FEATURES PROVIDED: CASEHARDENED
•
HEAD HEIGHT: 0.094 INCHES NOMINAL IN
•
SCREW MATERIAL: STEEL
•
THREAD QUANTITY PER INCH: 40
•
THREAD DIRECTION: RIGHT-HAND
•
SCREW SURFACE TREATMENT: NICKEL
TECHNICAL CHARACTERISTICS
INTERNAL DRIVE STYLECROSS RECESS TYPE 1
THREAD SERIES DESIGNATORUNF
FEATURES PROVIDEDCASEHARDENED
HEAD HEIGHT0.094 INCHES NOMINAL IN
SCREW MATERIALSTEEL
THREAD QUANTITY PER INCH40
THREAD DIRECTIONRIGHT-HAND
SCREW SURFACE TREATMENTNICKEL
WIDTH BETWEEN FLATS0.250 INCHES NOMINAL IN
THREAD LENGTH0.406 INCHES MINIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
2508InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
281701InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
23643InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
2037AS877-04InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
4594A-8InterchangeableGOVERNMENT REGISTRY
Terminal Board
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 72508?
72508 is a RESISTOR,VARIABLE,WIRE WOUND,PRE.
What parts can replace 72508?
There are 5 known substitutes for 72508: 2508, 281701, 23643 and 2 more. Substitute compatibility should be verified for your specific system.
Is 72508 still available?
72508 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: September 2026