PartsTable
Technical Data Sheet
PartsTable / COMPONENT / NAS50-137
NAS50-137 ✓ 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 RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, head_style: HEXAGON, ring_style: INTERNAL, grip_length: 0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN, head_height: 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN, thread_class: 3A A. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-00-252-4735, 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
NAS50-137
NSN: 5325-00-252-4735
FSC: 5325
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL
head_styleHEXAGON
ring_styleINTERNAL
grip_length0.484 INCHES MINIMUM AND 0.516 INCHES MAXIMUM IN
head_height0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM IN
thread_class3A A
usage_designINTERNAL
thread_length0.374 INCHES MINIMUM AND 0.453 INCHES MAXIMUM IN
fastener_length0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM IN
major_thickness0.050 INCHES NOMINAL IN
strength_ratingERR-060
outside_diameter1.486 INCHES NOMINAL IN
NSN5325-00-252-4735
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: NAS50-137 · 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
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
USAGE DESIGN: INTERNAL
•
SURFACE TREATMENT: CADMIUM AND CHROMATE
•
MATERIAL: STEEL COMP 1070 OR STEEL COMP 1572 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1085 OR STEEL COMP 1086 OR STEEL COMP 1090
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66, COMP 1070 FED STD 1ST MATERIAL RESPONSE OR FED STD 66, COMP 1072 FED STD 2ND MATERIAL RESPONSE OR FED STD 66, COMP 1074 FED STD 3RD MATERIAL RESPONSE OR FED STD 66, COMP 1075 FED STD 4TH MATERIAL RESPONSE OR FED STD 66, COMP 1078 FED STD 5TH MATERIAL RESPONSE OR FED STD 66, COMP 1080 FED STD 6TH MATERIAL RESPONSE OR FED STD 66, COMP 1084 FED STD 7TH MATERIAL RESPONSE OR FED STD 66, COMP 1085 FED STD 8TH MATERIAL RESPONSE OR FED STD 66, COMP 1086 FED STD 9TH MATERIAL RESPONSE OR FED STD 66, COMP 1090 FED STD 10TH MATERIAL RESPONSE
•
MAJOR THICKNESS: 0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
•
OUTSIDE DIAMETER: 1.506 INCHES MINIMUM AND 1.551 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
TECHNICAL CHARACTERISTICS (FLIS)
CASEHARDENING INDICATORNOT CASEHARDENED
USAGE DESIGNINTERNAL
SURFACE TREATMENTCADMIUM AND CHROMATE
MATERIALSTEEL COMP 1070 OR STEEL COMP 1572 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1085 OR STEEL COMP 1086 OR STEEL COMP 1090
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66, COMP 1070 FED STD 1ST MATERIAL RESPONSE OR FED STD 66, COMP 1072 FED STD 2ND MATERIAL RESPONSE OR FED STD 66, COMP 1074 FED STD 3RD MATERIAL RESPONSE OR FED STD 66, COMP 1075 FED STD 4TH MATERIAL RESPONSE OR FED STD 66, COMP 1078 FED STD 5TH MATERIAL RESPONSE OR FED STD 66, COMP 1080 FED STD 6TH MATERIAL RESPONSE OR FED STD 66, COMP 1084 FED STD 7TH MATERIAL RESPONSE OR FED STD 66, COMP 1085 FED STD 8TH MATERIAL RESPONSE OR FED STD 66, COMP 1086 FED STD 9TH MATERIAL RESPONSE OR FED STD 66, COMP 1090 FED STD 10TH MATERIAL RESPONSE
MAJOR THICKNESS0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN
OUTSIDE DIAMETER1.506 INCHES MINIMUM AND 1.551 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIAL HARDNESS RATING47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
RING STYLEINTERNAL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
101736Interchangeable
interchangeable cross-reference
interchangeable
50137Interchangeable
interchangeable cross-reference
interchangeable
200-1048-1Interchangeable
interchangeable cross-reference
interchangeable
23695Interchangeable
interchangeable cross-reference
interchangeable
9-472-3Interchangeable
interchangeable cross-reference
interchangeable
265473PC11Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is NAS50-137?
NAS50-137 is a RING,RETAINING.
What parts can replace NAS50-137?
There are 17 known substitutes for NAS50-137: 101736, 50137, 200-1048-1 and 14 more. Substitute compatibility should be verified for your specific system.
Is NAS50-137 still available?
NAS50-137 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: July 2026