Custom Injection Molding Plastic Thread Protectors Multi Size Available
Custom Injection-Molded Plastic Thread Protectors — Multiple-Size Order Planning
Custom injection-molded plastic thread protectors cover the identified pipe-end connection during transport and storage. For an order containing several sizes, provide a separate drawing or clearly identified sample for each connection and pin or box configuration. Resin, molded dimensions and fit are reviewed per part; plastic and metal-plastic constructions are separate specifications. Inspect protectors before reuse and follow the agreed handling procedure.
Size references in inches: 2-3/8, 2-7/8, 3-1/2, 4, 4-1/2, 5, 5-1/2, 6-5/8, 7, 7-5/8, 8-5/8, 9-5/8, 10-3/4, 11-3/4, 13-3/8, 16 and 20. Connection references include NC26, NC38, NC50, REG, BTC, STC and LTC. Build the order by exact size/connection combinations; this list does not establish interchangeable fit or tooling availability for every combination.
Multiple-Size Specification Checklist:
1. Assign a distinct part number to each connection and end configuration.
2. State handling temperature and outdoor exposure requirements.
3. Specify the plastic resin grade for each part.
4. Agree molded or printed size identification.
5. Review installation and removal features by configuration.
6. Provide the applicable drawing and revision for each size.
7. Define thread coverage and clearance requirements.
8. Trial-fit each size on its intended pipe end.
9. Agree handling tests and acceptance criteria where required.
10. Define storage and reuse inspection requirements.
11. Pack and label different size/connection items separately.
Packaging & Shipping
| Port: | Shanghai |
| MOQ: | 1000 pcs,Custom parts: 5000pcs |
| Packing: | bulk packing or custom packing |
| Payment: | PayPal, T/T, Western Union, L/C |
| Delivery time: | Depend on the quantity |
Other oil and gas industry accessories for choice:
Our company
Shanghai Qinuo Industry Co., Ltd. reviews custom plastic protector enquiries from identified drawings or samples. A multiple-size enquiry should list each item separately with its connection details and quantity.
The molding review covers resin selection, thread engagement, wall sections, gripping features and identification for each protector geometry.
Tooling scope and sample approval are agreed per part. A fit approval for one connection does not automatically approve other sizes in the order.
Manufacturing operates under ISO 9001 quality management. Specify inspection records and any additional product documents required for the ordered protectors.
FAQ
1. How should a multiple-size enquiry be organized?
Use one line per part number, size, full connection designation and pin or box configuration, with a quantity for each line.
Attach the matching drawing revision or identified sample reference so similar-looking parts remain traceable to the correct connection.
2. What needs review before tooling approval?
a. Resin grade and color for each part.
b. Thread geometry and dimensional tolerances.
c. Engagement length and end-face clearances.
d. Wall sections, ribs and gripping features.
e. Marking and part identification.
f. Acceptable flash and surface requirements.
g. Sample-fit and inspection criteria.
3. Can one sample approve all sizes?
1. Each geometry needs its own dimensional review.
2. Trial-fit each connection where required.
3. Check coverage and installation access per part.
4. Record results against the matching drawing revision.
5. Approve production for the specific reviewed item.
4. What should be checked when packing mixed sizes?
1. Correct quantities by part number.
2. Size and connection labels.
3. Pin or box configuration.
4. Resin and lot identification where required.
5. Packing separation and agreed inspection documents.
Send the itemized size/connection list with drawings, resin specifications and quantities for a multiple-size molding quotation.
Custom protectors can be reviewed from drawings or samples; approve molded dimensions and fit for each ordered configuration.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.