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Technical Data Sheet
PartsTable / COMPONENT / 990C237H01
990C237H01 ✓ 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

The STUD,TURNLOCK FASTENER is a the manufacturer industrial component. Key specifications include diameter: 0.375 INCHES NOMINAL IN, material: STEEL OVERALL, drive_type: SLOTTED, grip_length: 0.465 INCHES NOMINAL IN, shank_neck_length: 0.347 INCHES NOMINAL IN, surface_treatment: ZINC OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-126-5374, 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
990C237H01
NSN: 5325-00-126-5374
FSC: 5325
CAGE: 18323 — NORTHROP GRUMMAN SYSTEMS CORPORATION DBA ELECTRONIC SYSTEMS (USA)
SPECIFICATIONS
diameter0.375 INCHES NOMINAL IN
materialSTEEL OVERALL
drive_typeSLOTTED
grip_length0.465 INCHES NOMINAL IN
shank_neck_length0.347 INCHES NOMINAL IN
surface_treatmentZINC OVERALL
securing_device_typeRING
turnlock_stud_head_styleFLAT COUNTERSUNK
stud_shank_major_diameter0.240 INCHES NOMINAL IN
turnlock_stud_shank_styleSTUD SHANK
material_accommodated_thickness0.310 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN
NSN5325-00-126-5374
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: 990C237H01 · 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
•
DRIVE TYPE: SLOTTED
•
SECURING DEVICE TYPE: RING
•
TURNLOCK STUD HEAD STYLE: FLAT COUNTERSUNK
•
TURNLOCK STUD SHANK STYLE: STUD SHANK
•
SHANK NECK LENGTH: 0.347 INCHES NOMINAL IN
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: STEEL OVERALL
•
STUD SHANK MAJOR DIAMETER: 0.240 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
DRIVE TYPESLOTTED
SECURING DEVICE TYPERING
TURNLOCK STUD HEAD STYLEFLAT COUNTERSUNK
TURNLOCK STUD SHANK STYLESTUD SHANK
SHANK NECK LENGTH0.347 INCHES NOMINAL IN
SURFACE TREATMENTZINC OVERALL
MATERIALSTEEL OVERALL
STUD SHANK MAJOR DIAMETER0.240 INCHES NOMINAL IN
MATERIAL ACCOMMODATED THICKNESS0.310 INCHES MINIMUM AND 0.329 INCHES MAXIMUM IN
DIAMETER0.375 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 11
52061Interchangeable
interchangeable cross-reference
interchangeable
RC20GF3325Interchangeable
interchangeable cross-reference
interchangeable
100-005-332Interchangeable
interchangeable cross-reference
interchangeable
411336-99Interchangeable
interchangeable cross-reference
interchangeable
Q/E2BP/R1019 POS. 073Interchangeable
interchangeable cross-reference
interchangeable
CR2450NInterchangeable
IBM 3V Lithium Coin battery OEM
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 990C237H01?
990C237H01 is a STUD,TURNLOCK FASTENER.
What parts can replace 990C237H01?
There are 11 known substitutes for 990C237H01: 52061, RC20GF3325, 100-005-332 and 8 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 990C237H01?
990C237H01 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-126-5374. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026