Screw Hex Soc

Enhance your heavy equipment performance with the Case Construction Screw Hex Soc #991981. This durable, high-quality screw is designed for optimal fit and reliability, ensuring your machinery operates smoothly and efficiently on any job site.

Compatible equipment

This part fits CASE LONG TRACK/TURNABLE LEVELER CRAWLER EXCAVATOR, POCLAIN CRAWLER EXCAVATOR, COMPACT WHEEL LOADER STD TC - TIER 4, COMPACT WHEEL LOADER STD ZB - TIER 4, CASE CRAWLER EXCAVATOR (NORTH AMERICA), POCLAIN CRAWLER EXCAVATOR (S/N 12321 & AFTER), POCLAIN CRAWLER EXCAVATOR (S/N 8321 & AFTER), CASE CRAWLER EXCAVATOR, COMPACT WHEEL LOADER TIER 2 (NA), SMALL WHEEL LOADER, POCLAIN CRAWLER EXCAVATOR - CK (12440-13030) - CL (8441-8714), POCLAIN CRAWLER EXCAVATOR - ELECTRICAL MOTOR (ZAIRE), DROTT LOGGER & HEAVY DUTY CRAWLER EXCAVATOR, COMPACT WHEEL LOADER HS ZB - TIER 4, CASE CRAWLER EXCAVATOR (PRIOR TO S/N CGG0011601), CASE CRAWLER EXCAVATOR (S/N CGG0011601 & AFTER), CASE EXCAVATOR - HYDRAULIC SHEARS, CASE CRAWLER EXCAVATOR (S/N 120301 & AFTER), CASE CRAWLER EXCAVATOR (S/N 10501 & AFTER), POCLAIN WHEELED EXCAVATOR, CASE CRAWLER EXCAVATOR (S/N 15401-) (S/N 106801-), CASE CRAWLER EXCAVATOR (S/N 74163-74418) (S/N 15201-), CASE TURNTABLE LEVELER CRAWLER EXCAVATOR, CASE/POCLAIN CRAWLER EXCAVATOR (S/N 9501 & AFTER), POCLAIN CRAWLER EXCAVATOR (NORTH AMERICA) including models 1088, 115CL, 121F, 125B, 160CK, 160CKS, 160CL, 170B, 170C, 21D, 21F, 220, 220B, 220CKS, 221F, 321F, 688, 688BCK, 688C, 75C, 75P, 888, 90BCL, 90CL, RC200.

Frequently asked questions

What is the part number?

The manufacturer part number is 991981.

Is this a genuine OEM part?

Yes. Southeastern Equipment stocks OEM and quality aftermarket parts for heavy equipment. Contact us if you need a specific OEM source or aftermarket option.

Will this fit my machine?

See the compatible equipment list above. If your model is not listed, call us with your machine's serial number and we can confirm.

Where does this ship from?

Southeastern Equipment Company ships parts nationwide from our US warehouse. Orders placed before 2 PM ET typically ship same day.

Free pickup at any of our 17 branches across Ohio, Indiana, Michigan, and Kentucky. Select your preferred branch at checkout.

30-day no-fault returns. Bought the wrong part? Send it back for a full refund — no restocking fees, no minimums.