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RST237 — RING,RETAINING

✓ Government record, cited
— · BOLT SCREW
PRODUCT OVERVIEW

RST237: RING,RETAINING.

The RING,RETAINING is a the manufacturer industrial component. Key specifications include material: STEEL, ring_style: EXTERNAL, usage_design: EXTERNAL, inside_diameter: 2.197 INCHES NOMINAL IN, major_thickness: 0.078 INCHES NOMINAL IN, outside_diameter: 2.505 INCHES MINIMUM AND 2.530 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5325-00-784-1702, 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
RST237
NSN: 5325-00-784-1702
NIINs: 007841702, 008039974
FSC: 5325 — Fastening Devices
CAGE: 80756 — SPIROLOX INC (USA)
SPECIFICATIONS
materialSTEEL
ring_styleEXTERNAL
usage_designEXTERNAL
inside_diameter2.197 INCHES NOMINAL IN
major_thickness0.078 INCHES NOMINAL IN
outside_diameter2.505 INCHES MINIMUM AND 2.530 INCHES MAXIMUM IN
casehardening_indicatorNOT CASEHARDENED
material_hardness_rating47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationFED-STD-66 NO. 1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE
NSN5325-00-784-1702
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: RST237 · 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
•
USAGE DESIGN: EXTERNAL
•
MATERIAL DOCUMENT AND CLASSIFICATION: FED STD 66, COMP 1070 FED STD 1ST MATERIAL RESPONSE AND FED STD 66, COMP 1072 FED STD 2ND MATERIAL RESPONSE AND FED STD 66, COMP 1074 FED STD 3RD MATERIAL RESPONSE AND FED STD 66, COMP 1075 FED STD 4TH MATERIAL RESPONSE AND FED STD 66, COMP 1078 FED STD 5TH MATERIAL RESPONSE AND FED STD 66, COMP 1080 FED STD 6TH MATERIAL RESPONSE AND FED STD 66, COMP 1084 FED STD 7TH MATERIAL RESPONSE AND FED STD 66, COMP 1085 FED STD 8TH MATERIAL RESPONSE AND FED STD 66, COMP 1086 FED STD 9TH MATERIAL RESPONSE AND FED STD 66, COMP 1090 FED STD 10TH MATERIAL RESPONSE
•
CROSS-SECTIONAL SHAPE STYLE: DOUBLE OVAL
•
OUTSIDE DIAMETER: 2.505 INCHES MINIMUM AND 2.530 INCHES MAXIMUM IN
•
MAJOR THICKNESS: 0.075 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
•
INSIDE DIAMETER: 2.223 INCHES MINIMUM AND 2.248 INCHES MAXIMUM IN
•
CASEHARDENING INDICATOR: NOT CASEHARDENED
•
RING STYLE: SPECIAL FLAT
TECHNICAL CHARACTERISTICS
USAGE DESIGNEXTERNAL
MATERIAL DOCUMENT AND CLASSIFICATIONFED STD 66, COMP 1070 FED STD 1ST MATERIAL RESPONSE AND FED STD 66, COMP 1072 FED STD 2ND MATERIAL RESPONSE AND FED STD 66, COMP 1074 FED STD 3RD MATERIAL RESPONSE AND FED STD 66, COMP 1075 FED STD 4TH MATERIAL RESPONSE AND FED STD 66, COMP 1078 FED STD 5TH MATERIAL RESPONSE AND FED STD 66, COMP 1080 FED STD 6TH MATERIAL RESPONSE AND FED STD 66, COMP 1084 FED STD 7TH MATERIAL RESPONSE AND FED STD 66, COMP 1085 FED STD 8TH MATERIAL RESPONSE AND FED STD 66, COMP 1086 FED STD 9TH MATERIAL RESPONSE AND FED STD 66, COMP 1090 FED STD 10TH MATERIAL RESPONSE
CROSS-SECTIONAL SHAPE STYLEDOUBLE OVAL
OUTSIDE DIAMETER2.505 INCHES MINIMUM AND 2.530 INCHES MAXIMUM IN
MAJOR THICKNESS0.075 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN
INSIDE DIAMETER2.223 INCHES MINIMUM AND 2.248 INCHES MAXIMUM IN
CASEHARDENING INDICATORNOT CASEHARDENED
RING STYLESPECIAL FLAT
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 1085 OR STEEL COMP 1086 OR STEEL COMP 1090
SUBSTITUTES & CROSS-REFERENCES 2
5365007841702Reference document
Same NSN cross-reference
Reference document — Secondary reference
10866064Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 RST237?
RST237 is a RING,RETAINING.
What parts can replace RST237?
There are 2 known substitutes for RST237: 5365007841702, 10866064. Substitute compatibility should be verified for your specific system.
What is the NSN for RST237?
RST237 is cataloged in the U.S. Government catalog under NSN 5325-00-784-1702. 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.